Yesterday Apple released the OS X 10.7.4 update, which addressed a number of problems and security issues in OS X, including the logging of some users' passwords in plain text and the long-standing log-out option for reopening windows always being enabled. Along with this update, however, came a security update to Bluetooth that has caused some people's Bluetooth configurations to not work properly.
The Bluetooth service in OS X 10.7 through 10.7.3 had a bug that meant a local user could potentially hack the Bluetooth daemon process and execute arbitrary code with system privileges, hence Apple's security update. However, a number of Mac users have complained that their Bluetooth setups no longer work after the update. Some are finding their Bluetooth devices don't work and some report problems with Bluetooth audio.
In addition to Bluetooth issues, a few people have had problems with the system no longer showing the closely associated Wi-Fi hardware as being installed.If you are having trouble with Bluetooth and Wi-Fi connectivity after the OS X 10.7.4 update, there are several things you can try that may get your devices connected again.
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